Used CMMs at Auction: Coordinate Measuring Machine Values and Buying Guide

A coordinate measuring machine, or CMM, is one of the more specialized assets that surfaces in a metalworking, aerospace, or automotive-supplier liquidation, and one of the most misunderstood when it reaches the auction block. Search for a used CMM or a coordinate measuring machine for sale and you will find everything from a decade-old manual bridge machine to a late-model scanning system with a fresh calibration certificate, and the price gap between those two lots can be enormous. Whether you are buying a CMM for sale for a quality lab or deciding what a retiring inspection department is worth, understanding what drives value here is the difference between a smart bid and an expensive mistake.

What a Used CMM Is Actually Worth Depends on the Type

A coordinate measuring machine uses a probe, contact or non-contact, to capture X, Y, and Z coordinates on a part and compare them against a CAD model or GD&T drawing. Not every CMM does that the same way, and architecture is the first thing that separates a bargain lot from a machine your shop cannot use.

Bridge and gantry CMMs are the configuration you see most often in a metalworking shop: a moving bridge rides over a granite table. Common names at auction include Zeiss (Contura and Prismo among them), Hexagon (its Global line, plus the legacy Brown and Sharpe machines it acquired), Mitutoyo (Crysta-Apex and Bright), LK Metrology, and DEA.

Horizontal-arm CMMs are built for large, low-profile parts such as automotive body panels, where a bridge machine's footprint and vertical reach do not fit the work.

Portable articulated-arm CMMs, mainly Faro (Edge and Quantum) and Romer, now part of Hexagon, measure in place on the shop floor rather than on a fixed table, which makes them popular with fabricators and reverse-engineering shops.

Optical and video CMMs, such as the OGP SmartScope family, measure without touching the part and turn up most often in medical-device and electronics inspection.

Each category draws a different buyer pool, which matters as much as the hardware at sale time.

Inspecting a Coordinate Measuring Machine Before You Bid

Because a CMM's entire job is measuring to microns, condition issues that would be purely cosmetic on a mill can be deal breakers here.

Mechanical and Calibration Checks

• Granite table surface: look closely for chips, pitting, or scratches near clamping points, since surface damage affects flatness and repeatability.
• Air bearing operation: on a running machine, the bridge and carriage should glide smoothly with no chatter or drag, since a starved or scored air bearing is a costly repair.
• Scales and encoders: watch for error codes or position drift during a dry run, since glass-scale damage is common after a machine sits unpowered or gets bumped in transport.
• Probe and calibration artifacts: a calibration sphere or qualification standard should travel with the machine, or requalifying probes after the move adds time and cost.
• Documentation: recent calibration certificates, MPE (maximum permissible error) figures, and service records tell you more about true condition than any visual walk-around.

Software, Controller, and License Compatibility

• Controller generation: older CMM controllers, such as earlier Renishaw UCC-series units, can be harder to source parts and spares for than current-generation controllers.
• Software: PC-DMIS, Calypso, MODUS, and Metrolog are the packages you will see most often, so confirm which version is installed and whether it matches what your team already runs.
• License and dongle transfer: many CMM software licenses tie to a hardware dongle or a machine serial number, so confirm with the manufacturer that a license transfers before you bid, not after.
• Rigging and reinstallation: granite-based CMMs must be releveled, and ideally recalibrated, after any move, so budget for a certified technician visit.

What Used CMMs Typically Sell For at Auction

Values in this category span a wider range than almost any other machine-tool group, because accuracy, envelope size, and probing technology each move the number independently. As a general guide, not a substitute for an appraisal:

• Older manual or basic touch-trigger bridge CMMs from the 1990s and 2000s, with a small to mid-size envelope, typically sell in the low thousands to low five figures.
• Well-maintained mid-size bridge CMMs with a modern scanning probe, such as a Renishaw SP25, and current software licensing typically land in the five-figure range.
• Large-envelope, high-accuracy, or late-model machines with a five-axis scanning system, such as a Renishaw REVO, can run into six figures.
• Portable arm CMMs with current calibration and a complete software package typically bring five figures for recent models, and less for older or uncalibrated units.

These are general market ranges, not appraisal figures. Because value swings so much on accuracy, calibration status, and envelope, and because lenders, courts, and the IRS expect documentation behind a number, an AMEA-certified, USPAP-compliant appraisal from KD Auctions is the way to get a defensible figure for financing, insurance, or tax purposes.

How Bidding on a CMM Works at KD Auctions

All KD Auctions sales run fully online, so buyers anywhere can bid on a CMM without traveling to inspect it in person. Listings include:

• Lot photos and condition reports covering probe type, software, and last known calibration where available.
• Direct contact with the KD Auctions team for machine-specific questions before you bid.
• Standard buyer's premium and payment terms disclosed on every lot.
• Rigging guidance for granite-table machines, since improper lifting can knock a table out of level in transit.

Selling or Liquidating a CMM Through KD Auctions

If you are retiring a CMM, whether one machine or a full plant's inspection department, KD Auctions has moved metalworking and inspection equipment since Michael and Arlene Treger founded the company in 1996, with hundreds of auctions since then and hundreds of millions in machinery sales behind it.

There are two paths. A managed online auction typically runs 6 to 10 weeks from listing to close and puts your CMM in front of KD Auctions' network of 500,000+ industry contacts. A direct cash purchase moves faster: KD Auctions can make an offer within 24 to 72 hours, fund it 3 to 7 days after acceptance, and remove the equipment in 1 to 2 weeks, with onsite dispatch typically arranged in 48 to 72 hours.

Commission is tailored to the engagement and quoted upfront, and most sellers pay nothing out of pocket. Call 480.455.3910 to talk through which route fits your timeline, or start with an AMEA-certified, USPAP-compliant appraisal, accepted by lenders, courts, and the IRS, so you know what it is worth first.

Frequently Asked Questions

How much is a used CMM worth?

It depends on the type, envelope size, probe technology, controller generation, and calibration history, factors that can swing value from the low thousands to six figures on lots that look similar at a glance. A certified appraisal is the only reliable way to get a defensible number for a sale or financing.

Can I sell a single CMM, or does it need to be part of a larger equipment sale?

Standalone CMMs sell well at auction on their own, and KD Auctions markets every lot to its network of 500,000+ industry contacts. CMMs are also common line items in larger QC lab and plant liquidations, so either approach works.

Do I need to recalibrate a CMM after buying it at auction?

Yes. Even a well-maintained CMM should be releveled and recalibrated after transport, since granite tables and precision scales are sensitive to vibration and temperature during a move. Budget for a certified calibration technician before returning it to production.

Will a used CMM hold its rated accuracy in any shop?

Not necessarily. Published accuracy specs assume a controlled environment near 20 degrees Celsius. A CMM moved from a metrology lab onto an open shop floor may drift outside its rated tolerance until conditions are controlled, so plan for the room as well as the machine.